..., however, several polar compounds (mainly peptides) have been found in addition to CHCs both on the cuticle and on the comb surface of social insects, and their semiochemical role has been demonstrated in some circumstances. In the present study, we used the paper wasp social parasite–host system Polistes...

... factors (either peptides or neuromodulators) are produced in the brain and thoracic ganglia (TG). Two other regulatory non-peptide compounds, the steroid ecdysone and the sesquiterpene MF, are produced by the Y-organs and the mandibular organs, respectively. In the current review, I have tried...

..., we examined peptides isolated from venom ducts to elucidate the sequences and post-translational modifications of two eight-cysteine toxins (cal12a and cal12b of type 12 framework) that block voltage-gated Na + channels. Based on homology of leader sequence and mode of action, these toxins...

... mosquitoes ( Aedes aegypti ). Proctolin, leucomyosuppressin (LMS), serotonin and octopamine, which are known to modulate insect muscle contractions, and a mosquito neuropeptide, Aedes Head Peptide I (Aea-HP-I), which inhibits host-seeking behavior, were tested in the bioassays. LMS depressed contractile...

... molecules that are differentially distributed among a subpopulation of the neurons in the stomatogastric nervous system of Cancer borealis . * Author for correspondence. 12 08 1994 confocal microscopy peptides Crustacea neuromodulators Cancer borealis Over the past...

.... , Howard , J. C. , Butcher , G. W. , Haemmerling , G. J. and Neefjies , J. J. ( 1994 ). Selectivity of MHC-encoded peptide transporters from human, mouse and rat . Nature 367 , 648 – 651 . Mosckovitz , R. , Yan , N. , Heimer , E. , Felix , A. , Tate , S...

...Petra Skiebe; Henning Schneider ABSTRACT The effects of four Diploptera punctata allatostatin peptides on the stomatogastric nervous system of the crab Cancer borealis were studied. All of the peptides had similar actions on the activity of neurons involved in rhythmic movements of the pyloric...

... branches in this very complex system ( Bräunig, 1990 ) if they are not fixed in their natural position prior to all subsequent histological procedures. 29 10 1990 © 1991 by Company of Biologists 1991 insect heart circulation immunocytochemistry peptides neurosecretion corpora...

...Brian A. Cuthbert; Peter D. Evans ABSTRACT The responses of the semi-isolated heart preparation of the locust to the peptide FMRFamide and a range of its analogues is described. The nature of the response observed depended on the structure of the analogue and its concentration. In some cases...

...Peter D. Evans; Jorge Villegas ABSTRACT The effects of two specific antagonists of vasoactive intestinal peptide (VIP) receptors were investigated on the VIP-induced hyperpolarization of the membrane potential of the Schwann cell of the giant nerve fibre of the tropical squid. Both ( p Cl-D-Phe 6...

...Peter D. Evans; Camilla M. Myers ABSTRACT The modulatory actions of FMRFamide and related peptides on tension generated in the extensor-tibiae muscle of the locust hindleg by stimulation of the slow excitatory motor neurone (SETi) depend upon the frequency of stimulation of SETi. They have...

... acetyl-choline and an FMRFamide-like peptide); the Retzius cells (which contain serotonin) ; and the pressure sensory neurones, which contain an unidentified transmitter. Heart motoneurones (HE) and anterior pagoda (AP) cells in culture reacted with antiserum against the peptide FMRFamide...

... transmission and the modulation of these effects by biogenic amines and peptides. The extensor-tibiae muscle of the hind leg of the locust is a much studied, large muscle that is innervated by three identified motor neurones and one identified modulatory neurone. Much attention has recently been focused...

...Nathan J. Tublitz; James W. Truman ABSTRACT The abdominal ganglion neurosecretory cells responsible for the synthesis and release of two insect neurohormones, cardioacceleratory peptides 1 and 2 (CAP 1 and CAP 2 ), from the perivisceral organs (PVOs) have been identified in the tobacco hawkmoth...